Integrating a new touch screen control system, manufactured according to the standard two-stage reverse osmosis process: Double pump, double membrane + intermediate water tank (built-in) for manufacturing, the water production rate is as high as 24 liters/hour, under the condition of poor source water quality, the conductivity of RO product water can also be stabilized at 1-5μs/cm; compared with the single-stage RO system, the quality of the product water is better, and the cost of consumables for the post-purification unit is lower; Compared with the simplified double-stage RO system (single-pump double-membrane without intermediate water tank), the design is more reasonable, the quality of product water is more stable, especially suitable for areas with high conductivity or hardness of source water.